Furnace



April 1929. AIL. NELSON I 1,710,234

FURNACE Filed June 15, 1925- Adoz z z. Ad 5022 Patented Apr. 23, 1929.

UNITED STATES ADOLPH L. NELSON, OF DETROIT, MICHIGAN, ASSIGNOR TO BOHNALUMINUM & BRASS PATENT OFFICE.

CORPORATION, OF DETROIT, MICHIGAN.

FURNACE.

Application filed June 15, 1925.

The invention relates to furnaces and refers more particularly toholding furnaces having pots containing molten metal which is removed byladies.

I-Ieretofore holding furnaces have bee-n constructed in such a mannerthat when the flame below the pothas eaten away either or both of theportions of the w: llaud pot constituting the connection or jointbetween theparts, the foreign material such as scale from the wall andthe pot has been blown into the pot and the molten metal containedtherein, thereby damaging the latter. With my invention this foreign material is deflected. away from the pet so that it cannot enter themolten metal. ,Furthermore this foreign. material is directed downwardlyat the outside of the wall so that it will cause no injury to theworkman. llith these as well as other objects in view the inventionresides in the novel features o construction. and combinations andarrange ments of parts as more fully llGl'GlIliLftGl set forth.

In the drawings Figure 1 is a plan view of a holding furnace embodyingmy invention;

Figure 2 is a transverse section therethrough;

Figure 3 is a similar View showing portions of the wall and pot eatenaway.

1 is the pot of the holding furnace containing the molten metal andhaving an open upper end. 2 is the wall for supporting the pot with itsbottom above the floor so that the flame has free play with the surfaceof the pot confined within the wall to maintain the molten metal at theproper temperature. The wall is annular and is preferably formed ofbricks with the annular metallic ring 3 at its top upon which rests theannular flange 4 at the upper edge of and integral with the pot, thejoint between this ring and flange being normally closed.

5 is a metallic ring which rests directly upon the flange 4 and ispreferably provided with the depending cylindrical flange 6 forpositioning the ring upon the pot. This rin extends outwardl over therin 8 of the furnace wall and is spaced thereaboi 'e Serial No. 37,314.

and terminates in the downwardly extending cylindrical flange 7, whichis located out wardly beyond the outer side of the wall and extendsbelow the ring thereof. IVith this arrangement, the metallic ring 5rests at all times upon the pot so that in the event that the flame eatsaway the material of the wall ring orpot flange normally forming theclosed joint and escapes carrying with it the foreign material such asscale of the wall or pet, this foreign material carried outwardly overthe wall and deflected down- .wardly at the outside thereof so that itcannot enterthc pot and the molten metal therein and will not causeinjury to the worlnnan.

What I claim as my invention is:

1. In a holding furnace, the combination joint therewith, and a ringsupported upon said annular flange and extending over said wall andprovidedivfih a depending flange outside of said wall for deflectingforeign material which might pass outwardly through said joint away fromsaid pot and downwardlyoutside of said wall.

3. In a holding furnace, the combination with an annular wall, of a pothaving at its upper edge an annular flange resting upon said wall andnormally forming a closed joint therewith, and a ring upon said annularflange and provided with positioning means engageable with the pot, saidring extending adjacent to said joint for deflecting foreign materialwhich might pass outwardly through said joint away from said pot.

In testimony whereof Iaflix my signature.

ADOLPH L. NELSON.

